spring boot 錯誤：Check your ViewResolver setup

Whitelabel Error Pagehtml

This application has no explicit mapping for /error, so you are seeing this as a fallback.spring

Fri Mar 23 10:34:26 CST 2018
There was an unexpected error (type=Internal Server Error, status=500).
Circular view path [index]: would dispatch back to the current handler URL [/home/index] again. Check your ViewResolver setup! (Hint: This may be the result of an unspecified view, due to default view name generation.)app

解決辦法：spring-boot

方法1.在請求方法上加註解：@ResponseBody，無需模板文件this

@RequestMapping("/home") @Controller() public class HomeController { @ResponseBody @RequestMapping("/index") public String index() { return "index"; } }


方法2. 用thymeleaf模板
在pom.xml的dependencies元素內加靜態模板依賴

　　　　<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
　　　　</dependency>

在resources/templates/建立html模板文件，文件名與請求方法return的字符串同樣，擴展名html： index.htmlspa

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<p th:text="${data}"></p>
</body>
</html>

@RequestMapping("/home") @Controller() public class HomeController { @RequestMapping("/index") public String index(HashMap<String,Object> map) { map.put("data","index.html"); return "index"; } }